Supermarkets throughout the Chicago area are routinely selling seafood
highly contaminated with mercury, a toxic metal that can cause learning
disabilities in children and neurological problems in adults, a Tribune
investigation has found.

In one of the nation's most comprehensive studies of mercury in
commercial fish, testing by the newspaper showed that a variety of popular
seafood was so tainted that federal regulators could confiscate the fish for
violating food safety rules.

The testing also showed that mercury is more pervasive in fish than what
the government has told the public, making it difficult for consumers to
avoid the problem, no matter where they shop.

It is not by happenstance that contaminated fish can be found on shelves
and at seafood counters throughout the region, from small neighborhood shops
on the South Side to sprawling supermarket chain stores in the northwest
suburbs.

The Tribune's investigation reveals a decades-long pattern of the U.S.
government knowingly allowing millions of Americans to eat seafood with
unsafe levels of mercury.

Regulators have repeatedly downplayed the hazards, failed to take basic
steps to protect public health and misled consumers about the true dangers,
documents and interviews show.

The government does not seize high-mercury fish that violate U.S. limits.

Regulators do not even inspect seafood for mercury--not in ports,
processing plants or supermarkets.

In fact, federal officials have tested so few fish that they have only a
limited idea of how much mercury many species contain, government data show.

For example, the government has tested just four walleye and 24 shrimp
samples since 1978. The newspaper tested more samples of commercial walleye
than the government has in the last quarter-century.

The fishing industry also has failed consumers. The newspaper's
investigation found that U.S. tuna companies often package and sell a
high-mercury tuna species as canned light tuna--a product the government
specifically recommends as a low-mercury choice.

The consequence is that eating canned tuna--one of the nation's most
popular foods--is far more hazardous than what the government and industry
have led consumers to believe.

Medical experts agree that, on balance, eating fish is good for most
people.

Seafood is a low-fat source of protein, and some fish are rich in omega-3
fatty acids, which are thought to help prevent heart disease.

And Americans have responded to the idea that fish is healthy: Per capita
seafood consumption hit an all-time high last year.

But for high-risk groups--young children, pregnant women, nursing mothers
and women who could get pregnant--some fish might do more harm than good.

Mercury can damage the central nervous system of children, causing subtle
delays in walking and talking as well as decreased attention span and
memory.

Adults can experience headaches, fatigue, numbness in the hands and feet,
and a lack of concentration. Some studies suggest that men also face an
increased risk of heart attacks.

No one knows how many people in the U.S. have been harmed by mercury in
fish. But a recent government study estimated 410,000 babies are born each
year at risk for mercury poisoning because of high levels in their mothers'
bodies.

The Tribune's testing suggests that many people unknowingly are putting
themselves at risk.

The newspaper randomly selected supermarket chain stores and fish markets
in the Chicago area and bought 18 samples each of eight kinds of fish,
including two types of canned tuna. The samples were sent for analysis to a
laboratory at Rutgers University, which has performed some of the nation's
only studies of mercury in store-bought seafood.

In the Tribune tests, some popular fish, such as swordfish, showed
extremely high levels of mercury; other fish, such as salmon, had low
amounts. Mercury levels varied widely in most kinds of fish tested,
sometimes spiking far higher in individual samples than the averages
reported by the government.

High levels also were found in two species for which the government has
not issued consumer warnings: orange roughy and walleye.

Many of the walleye contained so much mercury that the country supplying
it, Canada, could ban the fish from being sold within its borders because
the contamination violated Canadian safety standards.

Some samples of grouper, tuna steak and canned tuna were so high in
mercury that millions of American women would exceed the U.S. mercury
exposure limit by eating just one 6-ounce meal in a week. This conclusion is
based on applying a federal formula for the acceptable amount of mercury in
the bloodstream to a 161-pound woman, the government's estimated average
weight of a U.S. female of childbearing age.

UNCERTAINTIES POSE CHALLENGE FOR PUBLIC

The simple question "Is fish safe to eat?" depends on many factors. What
kinds of fish do you eat? How much do you eat? How often do you eat it? How
much do you weigh?

Avoiding mercury-contaminated fish is further complicated by the fact
that the metal is ubiquitous in the world's oceans, lakes and rivers. So it
likely does not matter who catches the seafood, processes it or sells it. In
fact, many supermarket chains share the same suppliers.

With environmental groups and some state officials calling for mercury
warnings in supermarkets, Jewel, Dominick's and other major chains have
begun to post advisories. But these chains cannot tell shoppers how much
mercury is in any particular piece of fish.

Shoppers have no way of knowing, for instance, if one piece of orange
roughy in a supermarket display case has a widely different amount of
mercury than the orange roughy fillet next to it. The same is true for
canned tuna and many other kinds of fish.

No federal testing program exists for mercury, and scientists can provide
only estimates of contamination based on limited sampling.

Officials with the Food and Drug Administration, which is responsible for
the safety of commercial seafood, told the Tribune that the agency has
neither the time nor the money to routinely test fish. They also said the
government's task of protecting consumers is complex.

"If fish were only bad, this would be easy," said David Acheson, the
FDA's chief medical officer. "But fish have many benefits."

Last year, the FDA and the U.S. Environmental Protection Agency jointly
issued an advisory that told pregnant women, young children and other
at-risk groups not to eat shark, swordfish, king mackerel and tilefish
because of high mercury levels. The warning also cautioned those groups to
limit their overall fish consumption to 12 ounces a week, including no more
than 6 ounces of canned albacore tuna.

The nation's overall food safety system has been repeatedly criticized
for flawed inspections and limited enforcement. But several government
studies have singled out the FDA for not doing enough to ensure fish is safe
to eat.

The FDA, for instance, does not require exporting countries to maintain
safety, sanitation and inspection programs comparable with the U.S. system,
even though 80 percent of the seafood that Americans consume is imported. By
contrast, the Department of Agriculture, which monitors meat and poultry,
requires every exporter to meet such standards.

For its part, the seafood industry stresses the health benefits of eating
fish. Industry representatives told the Tribune that tough mercury warnings
would not encourage consumers to eat fish that are less contaminated.

Instead, the industry fears such warnings would simply scare people away
from seafood altogether.

"If you stop eating tuna, it's not like you start eating a salmon
sandwich.

No one does that," said John Stiker, who until recently was an executive
vice president of Bumble Bee Seafoods, a leading canned tuna company. "They
end up eating some other kind of sandwich. And I got to tell you, there's
nothing good about ham for a pregnant mom and her baby. Nothing."

`I THOUGHT I WAS DOING MYSELF GOOD'

Almost all the mercury that people are exposed to comes from eating fish.

And almost all fish contain some amounts of the metal, much of which
falls into oceans, lakes and streams from air pollution.

Some of that pollution can travel around the world before falling to the
ground. So emissions from a factory in China can pollute a lake in America
and vice versa. Mercury also occurs naturally in rock and soil and is
continually being released into the oceans through erosion and underwater
volcanoes.

In water, bacteria chemically alter mercury, creating a highly toxic form
called methylmercury, which the tiniest fish eat or absorb. As bigger fish
eat smaller fish, mercury accumulates up the food chain, with the largest
predators, such as shark and swordfish, generally containing the most.

At the top of the food chain are people. And because mercury passes
easily through the placenta and can harm the developing nervous system,
fetuses and small children are most vulnerable to its effects.

Many experts now believe that even tuna-fish sandwiches--a favorite of
the American diet--can be risky for children.

"The fact that we poisoned our air and our oceans to such an extent that
we can't eat a damn tuna sandwich is just diabolical," said Ayelet Waldman,
a noted mystery author whose daughter was diagnosed with mercury poisoning
at age 5 after frequently eating tuna.

"You spend so much time as a parent making the world safe for your
children," Waldman said. "We strap 75 different kinds of helmets on our
kids, and here I was exposing [her to a] neurotoxin in the food I was giving
her because I thought it was healthier."

Solving the mercury problem ultimately will require reducing levels of
the pollutant in the environment, according to the National Academy of
Sciences, the nation's leading scientific advisory body. For now, though,
the academy says consumers can best protect themselves by eating low-mercury
fish.

The importance of avoiding mercury-laden seafood was underscored by a
study released this fall by researchers from Harvard Medical School.

Children born to women who ate fish during their pregnancies did better
on tests of memory and visual recognition, the study found. But if mothers
had high levels of mercury in their bodies--mercury absorbed from the fish
they ate--their children posted lower scores than those whose mothers ate
less-tainted fish.

Other studies suggest the heart benefits of eating fish might be offset
by mercury. Though the American Heart Association recommends eating fish
twice a week to "benefit heart health," two major European studies found
that mercury exposure can increase the risk of fatal heart attacks in men.

Waldman, of Berkeley, Calif., said that when her daughter, Sophie, was 5,
she seemed to stop learning. She had trouble sounding out words she had
already learned. She forgot how to tie her shoes.

During a heavy metals screening in 2000, Sophie showed high mercury
levels, her mother said. After Sophie's mother consulted with a San
Francisco internist, Dr. Jane Hightower, one of Sophie's favorite meals was
identified as the culprit: She was eating a tuna sandwich a week made with
canned albacore. Further tests by Hightower confirmed high mercury levels in
Sophie, the doctor said.

When Sophie quit eating tuna, she started learning again, her mother
said.

"She seemed to us like she was a different kid."

Mercury does not stay in the body forever, Hightower said. It takes six
months to a year for the metal to leave a person's bloodstream.

Hightower is one of the few American physicians who have diagnosed and
treated people with elevated mercury levels. After discovering that some of
her patients had complaints suggesting mercury poisoning, such as headaches,
fatigue and loss of concentration, she tested 123 children and adults who
had symptoms or who reported eating fish.

In a peer-reviewed study published in 2003, Hightower reported that 89
percent of the patients showed high mercury levels in their blood.

Many of the patients, she said, were wealthy professionals who dined out
frequently or ate fish as part of a workout regimen. Most, she said, were
unaware of the risks.

"I was incredibly surprised," said Arnold Michael, 48, a videographer in
Ft. Lauderdale who developed dizzy spells after eating tuna steaks and
canned tuna at least four times a week. "I was just bingeing on it."

Tests showed he had high mercury levels, and he contacted Hightower for
help. "I was eating fish," Michael said. "I thought I was doing myself
good."

BANNED IN CANADA, SOLD IN AMERICA

Testing by the Tribune showed that a variety of fish that consumers might
assume are relatively safe actually contain high levels of mercury.

For example, 15 of the orange roughy samples the Tribune bought had high
levels.

The testing also indicates mercury levels can vary widely even within a
given species. A sample of orange roughy from Dominick's in suburban

Crestwood had seven times more mercury than a piece from Jewel on North
Elston Avenue in Chicago.

Though some of the Tribune's results were in line with previous limited
U.S. sampling, others represented the first thorough testing of certain fish
in years.

The FDA has tested only four walleye samples since 1978, 14 fewer than
the Tribune. The newspaper found that walleye averaged 0.51 parts of mercury
per million parts of fish tissue.

That may sound like a tiny amount, but mercury is so toxic that, by one
estimate, a teaspoon of the metal is enough to contaminate a small lake. The
amount the Tribune found in walleye, which was imported from Canada, is
above the limit at which Canadian officials can ban fish from sale within
that country's borders.

Four of the walleye samples were even above the much weaker U.S. limit of
1 part per million.

In an interview earlier this year, Canadian officials said their own
testing in Lake Erie, where almost all of the country's walleye exports
originate, showed there was no reason for concern.

"Why should we spend resources looking for a problem we know doesn't
exist?" said John Hoeve, a senior policy officer for the Canadian Food
Inspection Agency.

When told later about the Tribune test results, Hoeve said he was
surprised the newspaper found mercury levels in some Canadian walleye that
exceeded the U.S. standard. "I fully expected fish over the Canadian limit,
but I wouldn't have expected those kind of numbers," he said.

People buying fishing licenses are given mercury warnings for walleye and
other freshwater fish, but the federal government does not require such
advisories in American supermarkets--even if the fish comes from the same
waters.

State environmental agencies and the EPA oversee recreationally caught
fish, while the FDA is responsible for commercial fish. And the FDA has not
extensively tested fish or issued comprehensive mercury warnings.

Agency officials said not enough walleye is consumed nationwide to merit
their attention, even though the fish is popular in the Midwest. "Walleye
just isn't going to be high on our radar screens," Acheson said.

In the Tribune's testing, walleye and orange roughy averaged below the
government's do-not-sell limit of 1 part per million, but still high enough
that a 161-pound woman should eat no more than 3.2 ounces of orange roughy
and 3.5 ounces of walleye in a week.

The FDA has issued warnings for canned albacore tuna, which has averaged
0.35 parts per million in the agency's testing. Yet the agency has not
issued warnings for orange roughy, which averaged 0.57 parts per million in
the Tribune testing, or walleye, which was at 0.51.

When the FDA issued its mercury warning last year--an advisory posted on
its Web site but not required in stores--the agency did not include some
fish it knew had high levels of the toxic metal. Officials said they wanted
to keep the advice simple.

Swordfish showed the highest mercury levels in the Tribune tests,
averaging 1.41 parts per million, well above the 1.0 limit at which
regulators can confiscate fish. In FDA testing, swordfish has averaged 0.97
parts per million.

FDA officials said it is impractical to test individual swordfish to weed
out those that are heavily contaminated.

Issuing warnings is a better way to protect at-risk groups, such as young
children and pregnant women, the officials said. "Rather than saying, `You
can eat swordfish as long as it has been tested,' we're saying, `Don't eat
those fish,'" Acheson said.

Though it is unclear whether a single high-mercury meal could harm a
fetus, experts say the developing nervous system is so sensitive to toxic
substances that caution should prevail. "You only get one chance to develop
a brain," Hightower said.

Waldman, Sophie's mother, said that if there had been proper warnings
years ago, she never would have fed so much canned tuna to her daughter, now
11.

Today, Waldman said, she keeps track of how much fish her daughter eats
and consults an environmental group's Web site to find mercury levels in
various fish.

Deborah Rice, a former EPA toxicologist and mercury expert, said that
most consumers cannot be expected to research the mercury levels of their
favorite fish and "then keep a diary about when was the last time they ate
orange roughy."

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